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Never meet your heroes,USA Archives for they might crop you out of selfies.

One Conor McGregor fan learned this the hard way -- but she took the slight in stride to get some sweet revenge and give our story a funny ending.

Here's McGregor -- an Ultimate Fighting Championship superstar who beat Eddie Alvarez for the sport's lightweight championship this weekend -- in a recent Instagram post.

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He's showing off his "Gucci mustard" turtleneck there, but ... wait. That photo is kind of oddly cropped, right?

Right, indeed.

As she later proved via Twitter, a young McGregor fan named Erin Safran and her brother had previously snapped the photo in question.

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Cold-blooded, Conor! But Safran played it well by giving the fighter a taste of his own medicine on her Instagram page. She even quoted McGregor for good measure.

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We score this bout a TKO in favor of Safran -- on behalf of cropped-out people worldwide.